Surely, there may be some more spam/ddos attacks on the bitcoin network in the coming days that could return bitcoin transactions to peaking at 90% or possibly more, but so far, the blockchain seems to have been handling such attacks pretty well
All is working as Satoshi said:
I am not claiming that the network is impervious to DoS attack. I think most P2P networks can be DoS attacked in numerous ways. (On a side note, I read that the record companies would like to DoS all the file sharing networks, but they don't want to break the anti-hacking/anti-abuse laws.)
If we started getting DoS attacked with loads of wasted transactions back and forth, you would need to start paying a 0.01 minimum transaction fee.
...although the min fee is much lower nowadays. But the essence is the same. If there was no abusing of the network we could be sending coins for free right now due to the max blocksize being more than accommodating for our genuine transaction needs.
Zero cost txs / near zero cost txs => bring zero-cost abuse or near-zero cost abuse.
When that happens => cost to transact increases to bypass the abuser's queue.